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Fencer Vulns
medium 6.5

CVE-2023-29548 json

A wrong lowering instruction in the ARM64 Ion compiler resulted in a wrong optimization result.

published 2023-06-02 3 y ago modified 2026-10-24 16 d ago also EUVD-2023-33090

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 53%
public exploits
0
none known

Summary

A wrong lowering instruction in the ARM64 Ion compiler resulted in a wrong optimization result. This vulnerability affects Firefox < 112, Focus for Android < 112, Firefox ESR < 102.10, Firefox for Android < 112, and Thunderbird < 102.10.

Patch / fix

  • Mozilla Firefox 112
  • Mozilla Focus for Android 112
  • Mozilla Firefox ESR 102.10
  • Mozilla Firefox for Android 112
  • Mozilla Thunderbird 102.10
  • firefox-esr Debian 14, Debian 13, Debian 12 102.10.0esr-1
  • thunderbird Debian 14, Debian 13, Debian 12 1:102.10.0-1

debian advisories DEBIAN-CVE-2023-29548

  • firefox Ubuntu 18.04 LTS 112.0+build2-0ubuntu0.18.04.1
  • firefox Ubuntu 20.04 LTS 112.0+build2-0ubuntu0.20.04.1
  • mozjs102 Ubuntu 22.04 LTS 102.11.0-0ubuntu0.22.04.1
  • thunderbird Ubuntu 18.04 LTS 1:102.10.0+build2-0ubuntu0.18.04.1
  • thunderbird Ubuntu 20.04 LTS 1:102.10.0+build2-0ubuntu0.20.04.1
  • thunderbird Ubuntu 22.04 LTS 1:102.10.0+build2-0ubuntu0.22.04.1

ubuntu advisories UBUNTU-CVE-2023-29548

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • thunderbird RHEL 8 102.10.0-2.el8_7
  • thunderbird RHEL 9 102.10.0-2.el9_1
  • firefox RHEL 9 102.10.0-1.el9_1
  • firefox-x11 RHEL 9 102.10.0-1.el9_1
  • firefox RHEL 8 102.10.0-1.el8_7
  • thunderbird RHEL 7 102.10.0-2.el7_9
  • firefox RHEL 7 102.10.0-1.el7_9
  • thunderbird RHEL 8.1 E4S 102.10.0-2.el8_1

red hat advisories RHSA-2023:1802RHSA-2023:1803RHSA-2023:1788RHSA-2023:1809RHSA-2023:1786RHSA-2023:1810

  • MozillaThunderbird SLE Workstation Extension 15 SP4, SLE Module for Package Hub 15 SP4, openSUSE Leap 15.4 102.10.1-150200.8.113.2
  • MozillaFirefox SLES for SAP 15 SP3, SLES for SAP 15 SP2, SLES 15 SP3-LTSS +9 more 102.10.0-150200.152.84.1
  • MozillaFirefox SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES 12 SP5 +6 more 102.10.0-112.156.1
  • MozillaFirefox SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLE High Performance Computing 15 SP1-LTSS 102.10.0-150000.150.82.1

suse advisories SUSE-SU-2023:2064-1SUSE-SU-2023:1855-1SUSE-SU-2023:1819-1SUSE-SU-2023:1817-1

  • firefox-esr openSUSE Tumbleweed 128.5.1-1.1
  • MozillaThunderbird openSUSE Tumbleweed 102.10.0-1.1
  • MozillaFirefox openSUSE Tumbleweed 112.0.1-1.1

opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:12852-1openSUSE-SU-2024:12882-1

  • thunderbird AlmaLinux 8 102.10.0-2.el8_7.alma
  • thunderbird AlmaLinux 9 102.10.0-2.el9_1.alma
  • firefox AlmaLinux 9 102.10.0-1.el9_1.alma
  • firefox-x11 AlmaLinux 9 102.10.0-1.el9_1.alma
  • firefox AlmaLinux 8 102.10.0-1.el8_7.alma

almalinux advisories ALSA-2023:1802ALSA-2023:1809ALSA-2023:1786ALSA-2023:1787

  • thunderbird Rocky Linux 9 102.10.0-2.el9_1
  • thunderbird Rocky Linux 8 102.10.0-2.el8_7

rocky linux advisories RLSA-2023:1809RLSA-2023:1802

  • firefox-esr Alpine 3.23, Alpine 3.22, Alpine 3.21 +3 more 102.10.0-r0

alpine advisories ALPINE-CVE-2023-29548

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-29548 updated cvss 3.4

Mozilla: Incorrect optimization result on ARM64

  • Red Hat Enterprise Linux 6 firefox, thunderbird
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux AppStream (v. 8) firefox 102.10.0-1.el8_7, thunderbird 102.10.0-2.el8_7
    fixed: vendor fix RHSA-2023:1787
  • Red Hat Enterprise Linux AppStream (v. 9) firefox 102.10.0-1.el9_1, firefox-x11 102.10.0-1.el9_1, thunderbird 102.10.0-2.el9_1
    fixed: vendor fix RHSA-2023:1786
  • Red Hat Enterprise Linux AppStream AUS (v. 8.2) firefox 102.10.0-1.el8_2, thunderbird 102.10.0-2.el8_2
    fixed: vendor fix RHSA-2023:1789
  • Red Hat Enterprise Linux AppStream E4S (v. 8.1) firefox 102.10.0-1.el8_1, thunderbird 102.10.0-2.el8_1
    fixed: vendor fix RHSA-2023:1792
  • Red Hat Enterprise Linux AppStream E4S (v. 8.2) firefox 102.10.0-1.el8_2, thunderbird 102.10.0-2.el8_2
    fixed: vendor fix RHSA-2023:1789
  • Red Hat Enterprise Linux AppStream EUS (v.8.4) firefox 102.10.0-1.el8_4, thunderbird 102.10.0-2.el8_4
    fixed: vendor fix RHSA-2023:1790
  • Red Hat Enterprise Linux AppStream EUS (v.8.6) firefox 102.10.0-1.el8_6, thunderbird 102.10.0-2.el8_6
    fixed: vendor fix RHSA-2023:1788
show 3 more
  • Red Hat Enterprise Linux AppStream EUS (v.9.0) firefox 102.10.0-1.el9_0, thunderbird 102.10.0-2.el9_0
    fixed: vendor fix RHSA-2023:1785
  • Red Hat Enterprise Linux AppStream TUS (v. 8.2) firefox 102.10.0-1.el8_2, thunderbird 102.10.0-2.el8_2
    fixed: vendor fix RHSA-2023:1789
  • Red Hat Enterprise Linux Client (v. 7) firefox 102.10.0-1.el7_9, thunderbird 102.10.0-2.el7_9 Red Hat Enterprise Linux Client Optional (v. 7) firefox 102.10.0-1.el7_9 Red Hat Enterprise Linux Server (v. 7) firefox 102.10.0-1.el7_9 Red Hat Enterprise Linux Server Optional (v. 7) firefox 102.10.0-1.el7_9, thunderbird 102.10.0-2.el7_9 Red Hat Enterprise Linux Workstation (v. 7) firefox 102.10.0-1.el7_9, thunderbird 102.10.0-2.el7_9 Red Hat Enterprise Linux Workstation Optional (v. 7) firefox 102.10.0-1.el7_9
    fixed: vendor fix RHSA-2023:1791

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
21 mo ago

Exploit prediction

0.69% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected products

  • Mozilla Firefox
  • Mozilla Focus for Android
  • Mozilla Firefox ESR
  • Mozilla Firefox for Android
  • Mozilla Thunderbird

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.